<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
</head>
<body>
    <div id="app">
        <p>{{message}}</p>
    </div>
<script>
    const vm = Vue.createApp({
        setup(){
            return {
                message: 'Hello World'
            }
        }
    })
    vm.mount('#app')
</script>
</body>
</html>